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Fri, 21 Nov 2025 15:44:59 +0800 X-QQ-mid: xmsmtpt1763711099t8hwyz0vd Message-ID: X-QQ-XMAILINFO: M+6QKz8nsrJQcV7g5GXCXdXddYR3xutlAzsZVSuzte29feLFnTOMxmAPEh9kNF iDDT3V2c5wgSVJkE/ig65ixOvVUbF4jFsJDbGnJtVXftiC8voG+nJ1gMX9glvPqdrknDM9f6WT86 vOxTMfql5WwcArtW7X5Hdk5hHgKQqlVblqg72Yb+eP37HYVbuVIRxz0uZ0yxtWwfJ+fuYb6YZ+MZ p1zenSbyTzr5nk/0mqz3RqYqRMXi7CuNFfUHY0sqzRcwyCi+2uGT++rWItcHPzbZ+n0Mv9+PG7/g BJL7qXFHhJfZgqXifzMY0sNidPjG7NOCLRAiO9T8qLnrZ/ZYuO8WCkwepVmaaRMOoo23Ki3rjdkC VPtEEEIEfMJC8c5JB6DrLbBS0pMVEXIdGdis99zvz+iLAgXSOh7pwRC85m1D7R2YJK88wT6lvQAA 4yaPywPBVd2ZgckGZMQbCMv3xSyakKIKu60fMxqDc98depHRS4PK+A0BjMgGI5Wn3QPe3krwE2of t5Kh1WWe5Hetwu2jDmFocSdkidVidFQHpKHh+ylcqTDrT3Fsxn6no7B4ChtDZa91vX8ya46ikAif Gc1gYUVvd4Dtq9Ln1kqa/QViYhPKgCPJiP65b6jc8vMf05cWim/XRR4T/6aLFwHjPWN5KWvOkF8Y vjdC4O+ADC3XKKJ1rQ4tn5DcKqepDb2QaU87xKj7hF/DLKoIjgwu0+Nb8HXk2EQDlcp5gR8rFeTe tusEs/CKE2C1mDl7kD4ExmjrE9Ehc3uPI/6xDnf1eWXymidYrMKBauo03sW2cY0w/jSxu9BaBoG/ EohW+UgeEDvZvn9NQn2gKQoSVZDeQ+La0qjGxGvb6n6LsxGWaSrVP1ht3cSxTwq24ePwxL8Pms/S woPi0ONgLsaEkR14q8BGgPxOKkPUawuBef/Z9FjY+PlCJ3nZT1abP3SGUW+9r97NHPepb0pEhM3C fIU5j6M8yeo/zHTWewXSd/Ux/B7zmK7BVacfbYLd64Y/F4bsDM1GwY7jxlfNRDgHAF/EmRkmsS2j dveR7kHANYytpKUZHfXbKcLGuWvWuLgaj4yLiuoIbNqWXgPlwzoMp/j4b40FV2tXA08uP0dijXGt lQrjpHMXlLnShJbWysHOXMmLz+5T1B0UfkxLvY/cpixufx+8I= X-QQ-XMRINFO: MSVp+SPm3vtS1Vd6Y4Mggwc= From: Yuwen Chen To: senozhatsky@chromium.org Cc: akpm@linux-foundation.org, bgeffon@google.com, licayy@outlook.com, linux-block@vger.kernel.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org, minchan@kernel.org, richardycc@google.com, ywen.chen@foxmail.com Subject: Re: [RFC PATCHv5 0/6] zram: introduce writeback bio batching Date: Fri, 21 Nov 2025 15:44:59 +0800 X-OQ-MSGID: <20251121074459.3000341-1-ywen.chen@foxmail.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: References: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Rspamd-Queue-Id: F17DCA0002 X-Stat-Signature: wbsgp4b4xpqjuxmmmbp6kwco7wqyezmx X-Rspamd-Server: rspam02 X-Rspam-User: X-HE-Tag: 1763711105-278777 X-HE-Meta: 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 FMYAu/h1 qwT0JDjgJYxGWZhG8r45b65d8CgswtWPLNw1c3uOMXt6rqtyPGEFJcxeorRDnEgIf75Nra4krfWmcVygoJWU5KcxeQ9nOrbTskE0AAI79qymvdooC0qs2GQwr7BNloXcJnH+bIEm2CvgElVIxGHos1FW739030bZHhbdMhus4hGbhL+Ur8IpH+e8JwbKGaATQPP43Z8YtgVYG5iGlt+4s1XlYcQ== X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: On Fri, 21 Nov 2025 16:32:27 +0900, Sergey Senozhatsky wrote: > Is "before" blk-plug based approach and "after" this new approach? Sorry, I got the before and after mixed up. In addition, I also have some related questions to consult: 1. Will page fault exceptions be delayed during the writeback processing? 2. Since the loop device uses a work queue to handle requests, when the system load is relatively high, will it have a relatively large impact on the latency of page fault exceptions? Is there any way to solve this problem?